On the back, there's a picture of Travis County, Texas, District Attorney Rosemary Lehmberg's mugshot, with the word "Guilty" stamped above it.

Mr Perry, 64, is accused of overstepping his gubernatorial authority by threatening to veto the budget for a public-corruption office unless Ms Lehmberg, a Democrat who led the unit, quit. She had been convicted of drink-driving. When she refused to resign, Mr Perry cut the funding.

The mugshot was taken on August 19 when Mr Perry was booked on the charges after a grand jury indicted him.

The T-shirt is selling for $25 and proceeds would go to RickPAC, a political action committee formed by the Governor. Mr Perry plans to use the committee to donate money to Republican congressional candidates. Those cheques will also help Mr Perry build support within the party that could boost a 2016 presidential campaign, which he is considering.